For very good reason, beavers are referred to as both nature's hydro-engineers and a keystone species. Earning the reputation, busy as a beaver, these highly social animals who live as a family unit are North America's largest rodent. Awkward on land, beavers build dams and lodges for protection against predators and for access to food in the winter. They create canals to transport the logs. Many say, you cannot out work a beaver. They react to the sound of water by quickly damming it up with branches and mud. Their dams alter, store and slow the flow of water significantly modifying the landscape. Beavers substantially change the physical, chemical, and biological characteristics of the surrounding river ecosystem. They enhance biodiversity providing benefits to plants and animals. Beavers create wetlands in which an estimated 85% of all wildlife are dependent. Sadly, only 2% of the land out west are wetlands.
Beavers are integrally woven into our water resources, pollution, soil composition and retention, water temperature, wildlife habitat, fisheries, big game browse, ranching, farming, tourism, firefighting and climate change. Beaver have earned the distinction, central to all life.
What our country looks like today has changed drastically from the past. With the European settlement, fur trappers pillaged North America’s rivers, slashing beaver populations from more than 60 million to 100,000. Streams, creeks and canals became straight or were lost altogether. The Montana landscape we know was fundamentally changed by the removal of beaver before Montana was even settled. In November 1841 the famous trapper Osborne Russell wrote: “The trappers often remarked to each other as they rode over these lonely plains that it was time for the white man to leave the mountains as beaver and game had nearly disappeared."